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petrified wood |
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petrified woodFossil formed by the infiltration of minerals into cavities between and within cells of natural wood, usually by silica (silicon dioxide, SiO2) or calcite (calcium carbonate, CaCO3). Often this replacement of organic tissue by mineral deposits is so precise that the internal structure as well as the external shape is faithfully represented; sometimes even the cell structure may be determined. petrified wood [′pe·trə‚fīd ′wu̇d] (geology) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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I know that if I balance a chunk of petrified wood just so on a piece of granite, a small waterfall will splash and reveal the color of an ancient forest. Merta found many fossils, including petrified wood and fragments of freshwater clamshells, turtle shells, alligator vertebrae, and even a crocodile tooth. ``The deepest we've ever dug down is about 22 feet, but that year we found petrified wood at three different levels. |
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